You may not think of engineering and squirt guns in the same sentence. However, like many examples of engineering design, the squirt gun pump mechanism is uncomplicated, yet elegant, and very inexpensive to manufacture. The design is widely used because of its simplicity and low cost. With only a few moving parts, it is able to deliver a stream of…

This article discusses how, as part of a National Science Foundation-funded internship program, the authors translated smart papers into an exciting and informative activity for the middle school classroom. This activity opens students' eyes to an everyday technology and inspires them to ask questions about other hidden technologies that they…

Unmotivated, underachieving students pose a huge challenge for teachers. One way to motivate and stimulate student interest in a topic is to use humor. Humor can help students make new connections in learning and improves retention of information (Garner 2006). In this article, the authors describe how they integrated art and literature with…

Where does cellular respiration take place? How does a plant make food and in turn use the food to produce its own energy? Do animals carry on this process also? To help students answer these and other questions, have them build a model leaf, plant cell, and animal cell. This hands-on project allows students to see and manipulate the reactants and…

Describes an activity in which students apply the scientific method as they explore each step of crystal growing. Students select variables, record daily observations, and participate in discussions about the differences in crystal formation. Crystal recipe and procedures are provided. (DDR)

Demonstrating wave processes quantitatively in the classroom using standard classroom tools (such as Slinkys and wave tanks) can be difficult. For example, waves often travel too fast for students to actually measure amplitude or wavelength. Also, when teaching propagating waves, reflections from the ends set up standing waves, which can confuse…